Silicone Aquarium Sealant Aqueon 100%
100% Silicone Aquarium Sealant. Our 100% silicone aquarium sealant is easy to apply and waterproof to stop leaks. The high strength silicone creates a permanent seal that will not crack or shrink and is non-toxic making it perfect for use on all aquariums. For standard aquariums use clear and Black Seal aquariums use black sealant.